Coffee machine



FIG. 1 is a perspective view of a coffee machine showing my new design;

FIG. 2 is a front elevational view of the coffee machine of FIG. 1;

FIG. 3 is a right side elevational view of the coffee machine of FIG. 1;

FIG. 4 is a left side elevational view of the coffee machine of FIG. 1;

FIG. 5 is a top plan view of the coffee machine of FIG. 1; and,

FIG. 6 is a rear elevational view of the coffee machine of FIG. 1. 

We claim the ornamental design for a coffee machine, as shown and described. 